public ApplicationSettingForm(DataManager data) { if (data == null) { throw new ArgumentNullException("data"); } InitializeComponent(); _dataManager = data; this.textBox_AmountsSplitCharacter.Text = _dataManager.GetAmountsSplitCharacter().ToString(); this.textBox_CommentSplitCharacter.Text = _dataManager.GetCommentSplitCharacter().ToString(); }